What this site is
This site is a workshop bench in your browser. It has tests for keyboards, mice, microphones, webcams, speakers, headphones, monitors, controllers, printers, touch screens, phone sensors, processors, graphics cards, USB drives and more, plus fix guides for the faults those tests uncover. Everything is free and there is nothing to install or sign up for.
How the tests work
Each test runs inside the browser tab on your own device. Your camera picture, microphone sound, key presses, files and location are read by the page on your device and are never uploaded. When you close the tab, they are gone.
Browsers can measure a lot, but not everything. A web page cannot read a processor's temperature or see a Fn key, and some readings are estimates. Every test says plainly what it measures, what it estimates and what it cannot see, and points to the right tool when a browser is not enough.
How the guides are written
Each guide starts from the symptom people actually see, puts the most likely fix first, and gives exact steps for Windows, Mac and phones. Menu paths, button combinations and repair options are checked against the official support documentation from the companies that make the hardware and software. When those change, the guides are updated.
Contact
Found a mistake, a test that does not work on your device, or a fault the guides do not cover? Use the contact form. Every message is read.